@Override
  public void writeData(ObjectDataOutput out) throws IOException {

    out.writeInt(recordIdx);
    out.writeLong(BackingData.getLong(FamilyId, recordIdx, backing));
    out.writeShort(BackingData.getShort(MemberId, recordIdx, backing));
    // backing.write(recordIdx, 1, out);
  }
 public final long getFamilyId() {
   return BackingData.getLong(FamilyId, recordIdx, backing);
 }